Direct writing of customized structural-color graphics with colloidal photonic inks.
Direct writing of customized structural-color graphics with colloidal photonic inks.
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DOI：
10.1126/sciadv.abj8780
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发表时间：
2021-11-26
期刊：
影响因子：
13.6
通讯作者：
Kim SH
中科院分区：
文献类型：
--
作者：
Kim JB;Chae C;Han SH;Lee SY;Kim SH
Structural color graphics with any design and color combination can be directly printed with high precision. Colloidal crystals and glasses have been designed to develop structural colors that are tunable, iridescent, nonfading, and nontoxic. However, the low printability and poor printing quality have restricted their uses. Here, we report the direct writing of structural-color graphics with high brightness and saturation using colloidal inks. The inks are prepared by dispersing silica particles in acrylate-based resins, where the volume fraction is optimized to simultaneously provide pronounced coloration and satisfactory printing rheology. With the inks, any macroscopic design of lines and faces can be directly written on various substrates, where the microscopic colloidal arrangement is set to be either crystalline or amorphous depending on the resin viscosity to control the iridescence of the colors. In addition, the high mechanical stability and controlled modulus enable the graphics to be surface-transferred, origami-folded, or elastically stretched. This direct-writing approach provides unprecedented levels of controllability and versatility for pragmatic uses of structural colors.
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